Chocolate bar



FIG. 1 is a perspective view of a chocolate bar of the present design;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a side view of FIG. 1; and,

FIG. 5 is a front side view of FIG. 1. 

The ornamental design for a chocolate bar, as shown and described. 